<?php

/**
 * Smarty Internal Plugin Resource PHP
 *
 * Implements the file system as resource for PHP templates
 *
 * @package    Smarty
 * @subpackage TemplateResources
 * @author     Uwe Tews
 * @author     Rodney Rehm
 */
class Smarty_Internal_Resource_PHP extends Smarty_Resource_Uncompiled {
	/**
	 * container for short_open_tag directive's value before executing PHP templates
	 *
	 * @var string
	 */
	protected $short_open_tag;

	/**
	 * Create a new PHP Resource
	 *
	 */
	public function __construct() {
		$this->short_open_tag = ini_get('short_open_tag');
	}

	/**
	 * populate Source Object with meta data from Resource
	 *
	 * @param Smarty_Template_Source   $source    source object
	 * @param Smarty_Internal_Template $_template template object
	 *
	 * @return void
	 */
	public function populate(Smarty_Template_Source $source, Smarty_Internal_Template $_template = null) {
		$source->filepath = $this->buildFilepath($source, $_template);

		if ($source->filepath !== false)
		{
			if (is_object($source->smarty->security_policy))
			{
				$source->smarty->security_policy->isTrustedResourceDir($source->filepath);
			}

			$source->uid = sha1($source->filepath);
			if ($source->smarty->compile_check)
			{
				$source->timestamp = @filemtime($source->filepath);
				$source->exists = !!$source->timestamp;
			}
		}
	}

	/**
	 * populate Source Object with timestamp and exists from Resource
	 *
	 * @param Smarty_Template_Source $source source object
	 *
	 * @return void
	 */
	public function populateTimestamp(Smarty_Template_Source $source) {
		$source->timestamp = @filemtime($source->filepath);
		$source->exists = !!$source->timestamp;
	}

	/**
	 * Load template's source from file into current template object
	 *
	 * @param Smarty_Template_Source $source source object
	 *
	 * @return string template source
	 * @throws SmartyException if source cannot be loaded
	 */
	public function getContent(Smarty_Template_Source $source) {
		if ($source->timestamp)
		{
			return '';
		}
		throw new SmartyException("Unable to read template {$source->type} '{$source->name}'");
	}

	/**
	 * Render and output the template (without using the compiler)
	 *
	 * @param Smarty_Template_Source   $source    source object
	 * @param Smarty_Internal_Template $_template template object
	 *
	 * @return void
	 * @throws SmartyException if template cannot be loaded or allow_php_templates is disabled
	 */
	public function renderUncompiled(Smarty_Template_Source $source, Smarty_Internal_Template $_template) {
		$_smarty_template = $_template;

		if (!$source->smarty->allow_php_templates)
		{
			throw new SmartyException("PHP templates are disabled");
		}
		if (!$source->exists)
		{
			if ($_template->parent instanceof Smarty_Internal_Template)
			{
				$parent_resource = " in '{$_template->parent->template_resource}'";
			}
			else
			{
				$parent_resource = '';
			}
			throw new SmartyException("Unable to load template {$source->type} '{$source->name}'{$parent_resource}");
		}

		// prepare variables
		extract($_template->getTemplateVars());

		// include PHP template with short open tags enabled
		ini_set('short_open_tag', '1');
		include($source->filepath);
		ini_set('short_open_tag', $this->short_open_tag);
	}
}

?>
